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Fósturvöxtur íslenskra einbura

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L1990-08-76-F5.PDF
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Authors
Reynir Tómas Geirsson
María Hreinsdóttir
Guðrún Björg Sigurbjörnsdóttir
Persson, Per-Håkan
Issue Date
1990-10-01

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Citation
Læknablaðið 1990, 76(8):405-10
Abstract
To describe patterns and limits of intrauterine growth in the Icelandic population a longitudinal ultrasound study was carried out in 94 healthy women, all with regular 28±2day cycles and able to securely date the first'day of their last menstrual period. A total of 3795 measurements, with a mean of eight per woman, were obtained every three weeks during the second and third trimester. Biparietal, occipitofrontal, abdominal transverse and anteroposterior diameters (combined into mean abdominal diameter), as well as femur and humerus length were measured. The data were computerised and grouped into 12 two-week periods for each of which the mean examination day was calculated. Multiple regression analysis was applied to fit the data to mathematical equations. Third degree polynomials showed optimal fit to the bone measurements, but second degree to the abdominal measures. The equations gave values for the bone measurements very similar to those previously described from other Nordic countries, but because of larger size of the material and less accurate cycle dating, the dispersion of values was larger. Mean abdominal values were systematically about 7% lower, which probably was due to differences in measurement technique. This must be accounted for by use of an appropriate correction factor when the measurements are used to estimate fetal weight. Comparative data on fetal growth in the Nordic countries and nomograms for growth of Icelandic fetuses are presented.
Framvirk athugun á fósturvexti íslenskra einbura var gerð með mælingum í 94 heilbrigðum konum á öðrum og þriðja meðgönguþriðjungi. Allar konurnar gátu dagsett fyrsta dag síðustu tíða nákvæmlega og höfðu reglubundinn tíðahring. Mælingar voru gerðar á þriggja vikna fresti á höfuðmálum, 1) þvermáli (biparietal diameter (BPD)) og 2) fram-aftur máli (occipito-frontal diameter (OFD)), lengd lærleggjar og upparmsleggjar og tveimur þvermálum búks. Meðalbúkþvermál var einnig reiknað. Heildarfjöldi mælinga var 3795 og hver kona kom að meðaltali í átta mælingar. Mælingarnar voru tölvufærðar og flokkaðar til úrvinnslu í 12 tveggja-vikna flokka. Fjölþátta aðhvarfsjöfnur voru reiknaðar og jafnan sem sýndi besta aðlögun að mælingunum fyrir hvert mál valin samkvæmt hæsta ákvörðunarstuðlinum (r2) og minnsta meðalfráviki (SD) aðhvarfslínunnar. Þriðju gráðu aðhvarfsjöfnur lýstu best gildum fyrir beinamælingarnar, en annarrar gráðu jöfnur hæfðu búkmælingunum. Aðhvarfslínur meðalgilda og tveggja meðalfrávika voru færðar á flæðirit. Meðalgildi fyrir BPD og meðalbúkmælingar samkvæmt jöfnum frá öðrum Norðurlöndum voru borin saman við mælingar úr þessari athugun. Mælingar fyrir beinvöxt eru mjög svipaðar á Íslandi og annarsstaðar. Búkmælingarnar sýndu kerfisbundinn mun á þann veg að íslensku gildin voru að meðaltali um 7% lægri en sænskar tölur. Þetta byggist sennilega á mismunandi mælingaaðferðum. Við mat á fósturþyngd út frá erlendum töflum eða jöfnum þarf að gera ráð fyrir þessum mun og nota viðeigandi leiðréttingu.
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Neðst á síðunni er hægt að nálgast greinina í heild sinni með því að smella á hlekkinn Skoða/Opna(view/open)
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Icelandic Journal Articles (Peer Reviewed)

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